散点图是指在回归分析中，数据点在直角坐标系平面上的分布图，表示因变量随自变量而变化的大致趋势，常用于比较跨类别的聚合数据。下面的示例中，将演示通过Spire.XLS在Excel表格中创建散点图表的方法。

//实例化Workbook类的对象，并获取第一个工作表
 Workbook workbook = new Workbook();
 Worksheet sheet = workbook.Worksheets[0];
 //设置列宽,工作表名
 sheet.Range["A1:B1"].ColumnWidth = 15F;
 sheet.Name = "散点图";

 //创建散点图
 Chart chart = sheet.Charts.Add(ExcelChartType.ScatterMarkers);
 chart.DataRange = sheet.Range["B2:B10"];
 chart.SeriesDataFromRange = false;
 //指定散点图在sheet中的位置
 chart.LeftColumn = 4;
 chart.TopRow = 1;
 chart.RightColumn = 15;
 chart.BottomRow = 25;

 //添加图表标题
 chart.ChartTitle = "城市化与耕地面积变化散点图";
 chart.ChartTitleArea.IsBold = true;
 chart.ChartTitleArea.Size = 12;
 chart.PlotArea.ForeGroundColor = Color.Beige;
 //添加图表数据源
 sheet.Range["A1"].Value = "城市化水平";
 sheet.Range["A2"].Value = "10";
 sheet.Range["A3"].Value = "15";
 sheet.Range["A4"].Value = "17";
 sheet.Range["A5"].Value = "25";
 sheet.Range["A6"].Value = "35";
 sheet.Range["A7"].Value = "40";
 sheet.Range["A8"].Value = "38";
 sheet.Range["A10"].Value = "17";
 sheet.Range["A9"].Value = "24";
 sheet.Range["B1"].Value = "耕地面积";
 sheet.Range["B2"].Value = "26780";
 sheet.Range["B3"].Value = "24086";
 sheet.Range["B4"].Value = "20546";
 sheet.Range["B5"].Value = "15057";
 sheet.Range["B6"].Value = "11036";
 sheet.Range["B7"].Value = "12546";
 sheet.Range["B8"].Value = "9854";
 sheet.Range["B9"].Value = "13506";
 sheet.Range["B10"].Value = "18756";

 chart.Series[0].CategoryLabels = sheet.Range["B2:B10"];
 chart.Series[0].Values = sheet.Range["A2:A10"];
 sheet.Range["A1:B10"].Style.HorizontalAlignment = HorizontalAlignType.Center;
 sheet.Range["A1:B1"].Style.Font.IsBold = true;

 //添加趋势线
 IChartTrendLine trendLine = chart.Series[0].TrendLines.Add(TrendLineType.Exponential);
 trendLine.Name = "趋势线"; 

 //添加坐标轴名称
 chart.PrimaryValueAxis.Title = "城市化水平（%）";
 chart.PrimaryCategoryAxis.Title = "耕地面积（万hm^2）";

 //保存文档
 workbook.SaveToFile("result.xlsx", FileFormat.Version2013);

'实例化Workbook类的对象，并获取第一个工作表
Dim workbook As New Workbook()
Dim sheet As Worksheet = workbook.Worksheets(0)
'设置列宽,工作表名
sheet.Range("A1:B1").ColumnWidth = 15F
sheet.Name = "散点图"

'创建散点图
Dim chart As Chart = sheet.Charts.Add(ExcelChartType.ScatterMarkers)
chart.DataRange = sheet.Range("B2:B10")
chart.SeriesDataFromRange = False
'指定散点图在sheet中的位置
chart.LeftColumn = 4
chart.TopRow = 1
chart.RightColumn = 15
chart.BottomRow = 25

'添加图表标题
chart.ChartTitle = "城市化与耕地面积变化散点图"
chart.ChartTitleArea.IsBold = True
chart.ChartTitleArea.Size = 12
chart.PlotArea.ForeGroundColor = Color.Beige
'添加图表数据源
sheet.Range("A1").Value = "城市化水平"
sheet.Range("A2").Value = "10"
sheet.Range("A3").Value = "15"
sheet.Range("A4").Value = "17"
sheet.Range("A5").Value = "25"
sheet.Range("A6").Value = "35"
sheet.Range("A7").Value = "40"
sheet.Range("A8").Value = "38"
sheet.Range("A10").Value = "17"
sheet.Range("A9").Value = "24"
sheet.Range("B1").Value = "耕地面积"
sheet.Range("B2").Value = "26780"
sheet.Range("B3").Value = "24086"
sheet.Range("B4").Value = "20546"
sheet.Range("B5").Value = "15057"
sheet.Range("B6").Value = "11036"
sheet.Range("B7").Value = "12546"
sheet.Range("B8").Value = "9854"
sheet.Range("B9").Value = "13506"
sheet.Range("B10").Value = "18756"

chart.Series(0).CategoryLabels = sheet.Range("B2:B10")
chart.Series(0).Values = sheet.Range("A2:A10")
sheet.Range("A1:B10").Style.HorizontalAlignment = HorizontalAlignType.Center
sheet.Range("A1:B1").Style.Font.IsBold = True

'添加趋势线
Dim trendLine As IChartTrendLine = chart.Series(0).TrendLines.Add(TrendLineType.Exponential)
trendLine.Name = "趋势线"

'添加坐标轴名称
chart.PrimaryValueAxis.Title = "城市化水平（%）"
chart.PrimaryCategoryAxis.Title = "耕地面积（万hm^2）"

'保存文档
workbook.SaveToFile("result.xlsx", FileFormat.Version2013)

散点图效果：